private decimal GetOweAmount(long accountId, long sharedAccountId, DateTime month)
{
var expenses = ExpenseRepository.GetAccountExpenses(sharedAccountId);
expenses = expenses.Where(e => e.SpentDate.Year == month.Year && e.SpentDate.Month == month.Month).ToList();
var transfers = SharedAccountRepository.GetSharedAccountMoneyTransfer(sharedAccountId);
transfers = transfers.Where(t => t.ForYear == month.Year && t.ForMonth == month.Month).ToList();
var yourIncomeTotal = IncomeRepository.GetAccountIncome(accountId).Where(i => i.IncomeDate.Year == month.Year && i.IncomeDate.Month == month.Month).Sum(i => i.Amount);
var partnerIncomeTotal = IncomeRepository.GetPartnerIncome(accountId).Where(i => i.IncomeDate.Year == month.Year && i.IncomeDate.Month == month.Month).Sum(i => i.Amount);
var yourPercentage = yourIncomeTotal + partnerIncomeTotal == 0 ? 0 : yourIncomeTotal / (yourIncomeTotal + partnerIncomeTotal);
var sharedSpentTotal = expenses.Sum(e => e.Amount);
var yourSharedSpentTotal = expenses.Where(e => e.SpentAccountId == accountId).Sum(e => e.Amount);
var yourIdealSpentTotal = yourPercentage * sharedSpentTotal;
var youPayed = transfers.Where(t => t.PayerAccountId == accountId).Sum(t => t.Amount);
var youRecieved = transfers.Where(t => t.PayedAccountId == accountId).Sum(t => t.Amount);
var finalAmount = Math.Round(yourIdealSpentTotal - yourSharedSpentTotal, 2);
finalAmount = finalAmount - youPayed + youRecieved;
return(finalAmount);
}